M10, AP-001 freigegeben

.gitignore

@@ -74,3 +74,4 @@ replay_pid*
 /review-input.zip
 /run-milestone.ps1
 /run-v11.ps1
+.m2repo

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiChangeState.java

@@ -0,0 +1,25 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+/**
+ * Derived change-state view for the editor content.
+ * <p>
+ * The value is computed from the comparison between the baseline values and the current
+ * editor values.
+ */
+public enum GuiChangeState {
+
+    /** The current editor state matches its baseline. */
+    CLEAN,
+
+    /** The current editor state has diverged from its baseline. */
+    DIRTY;
+
+    /**
+     * Returns whether this state represents unsaved changes.
+     *
+     * @return {@code true} when the editor is dirty, otherwise {@code false}
+     */
+    public boolean isDirty() {
+        return this == DIRTY;
+    }
+}

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiConfigurationEditorState.java

@@ -0,0 +1,121 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import java.util.Objects;
+import java.util.Optional;
+
+/**
+ * Root editor state for the GUI configuration editor.
+ * <p>
+ * The state keeps the loaded file snapshot, the baseline values and the current editable values
+ * separate so later GUI layers can compare the current editor content against the original
+ * representation without relying on a manually maintained dirty flag.
+ *
+ * @param loadedFileSnapshot loaded file representation, or empty when the editor was created
+ *                           from the standard template
+ * @param baselineValues values representing the baseline the editor compares against
+ * @param values current editable configuration values
+ */
+public record GuiConfigurationEditorState(
+        Optional<GuiConfigurationFileSnapshot> loadedFileSnapshot,
+        GuiConfigurationValues baselineValues,
+        GuiConfigurationValues values) {
+
+    /**
+     * Creates a new editor state.
+     *
+     * @param loadedFileSnapshot loaded file representation; {@code null} becomes empty
+     * @param baselineValues baseline values; must not be {@code null}
+     * @param values current editable configuration values; must not be {@code null}
+     */
+    public GuiConfigurationEditorState {
+        loadedFileSnapshot = loadedFileSnapshot == null ? Optional.empty() : loadedFileSnapshot;
+        baselineValues = Objects.requireNonNull(baselineValues, "baselineValues must not be null");
+        values = Objects.requireNonNull(values, "values must not be null");
+    }
+
+    /**
+     * Returns whether the editor currently contains unsaved changes.
+     *
+     * @return {@code true} when the current values differ from the baseline, otherwise {@code false}
+     */
+    public boolean isDirty() {
+        return !baselineValues.equals(values);
+    }
+
+    /**
+     * Returns the derived change state for the current editor content.
+     *
+     * @return {@link GuiChangeState#DIRTY} when the editor is dirty, otherwise {@link GuiChangeState#CLEAN}
+     */
+    public GuiChangeState changeState() {
+        return isDirty() ? GuiChangeState.DIRTY : GuiChangeState.CLEAN;
+    }
+
+    /**
+     * Returns whether the editor currently has a loaded file snapshot.
+     *
+     * @return {@code true} when the editor was loaded from disk, otherwise {@code false}
+     */
+    public boolean hasLoadedFileSnapshot() {
+        return loadedFileSnapshot.isPresent();
+    }
+
+    /**
+     * Returns whether the editor represents a newly created configuration.
+     *
+     * @return {@code true} when no file snapshot is loaded, otherwise {@code false}
+     */
+    public boolean isNewConfiguration() {
+        return loadedFileSnapshot.isEmpty();
+    }
+
+    /**
+     * Returns a copy with different current editable values.
+     *
+     * @param values the new editable values; must not be {@code null}
+     * @return a new editor state containing the supplied values
+     */
+    public GuiConfigurationEditorState withValues(GuiConfigurationValues values) {
+        return new GuiConfigurationEditorState(loadedFileSnapshot, baselineValues, values);
+    }
+
+    /**
+     * Returns a copy with a different baseline.
+     *
+     * @param baselineValues the new baseline values; must not be {@code null}
+     * @return a new editor state using the supplied baseline
+     */
+    public GuiConfigurationEditorState withBaselineValues(GuiConfigurationValues baselineValues) {
+        return new GuiConfigurationEditorState(loadedFileSnapshot, baselineValues, values);
+    }
+
+    /**
+     * Returns a copy with a loaded file snapshot.
+     *
+     * @param snapshot the loaded file snapshot; must not be {@code null}
+     * @return a new editor state linked to the supplied snapshot
+     */
+    public GuiConfigurationEditorState withLoadedFileSnapshot(GuiConfigurationFileSnapshot snapshot) {
+        return new GuiConfigurationEditorState(Optional.of(snapshot), baselineValues, values);
+    }
+
+    /**
+     * Returns a copy without any loaded file snapshot.
+     *
+     * @return a new editor state without a loaded file snapshot
+     */
+    public GuiConfigurationEditorState withoutLoadedFileSnapshot() {
+        return new GuiConfigurationEditorState(Optional.empty(), baselineValues, values);
+    }
+
+    /**
+     * Returns a clean copy of this editor state by resetting the current values to the baseline.
+     *
+     * @return a clean editor state
+     */
+    public GuiConfigurationEditorState markClean() {
+        return baselineValues.equals(values)
+                ? this
+                : new GuiConfigurationEditorState(loadedFileSnapshot, baselineValues, baselineValues);
+    }
+}

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiConfigurationFileSnapshot.java

@@ -0,0 +1,86 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import java.nio.file.Path;
+import java.util.Objects;
+import java.util.Properties;
+
+/**
+ * Snapshot of a configuration file loaded from disk.
+ * <p>
+ * This type is intentionally separate from the editable editor state. It represents the file
+ * that was loaded, not the mutable values currently being edited.
+ */
+public final class GuiConfigurationFileSnapshot {
+
+    private final Path filePath;
+    private final Properties properties;
+
+    /**
+     * Creates a snapshot for the given file and properties.
+     *
+     * @param filePath path of the loaded file; must not be {@code null}
+     * @param properties loaded properties; must not be {@code null}
+     */
+    public GuiConfigurationFileSnapshot(Path filePath, Properties properties) {
+        this.filePath = Objects.requireNonNull(filePath, "filePath must not be null");
+        this.properties = copyOf(properties);
+    }
+
+    /**
+     * Returns the file path of the loaded configuration.
+     *
+     * @return the snapshot file path; never {@code null}
+     */
+    public Path filePath() {
+        return filePath;
+    }
+
+    /**
+     * Returns a defensive copy of the loaded properties.
+     *
+     * @return a copy of the loaded properties; never {@code null}
+     */
+    public Properties properties() {
+        return copyOf(properties);
+    }
+
+    /**
+     * Returns whether this snapshot was loaded from the given path.
+     *
+     * @param candidatePath the path to compare; may be {@code null}
+     * @return {@code true} when the paths match, otherwise {@code false}
+     */
+    public boolean hasFilePath(Path candidatePath) {
+        return filePath.equals(candidatePath);
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (this == other) {
+            return true;
+        }
+        if (!(other instanceof GuiConfigurationFileSnapshot that)) {
+            return false;
+        }
+        return filePath.equals(that.filePath) && properties.equals(that.properties);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(filePath, properties);
+    }
+
+    @Override
+    public String toString() {
+        return "GuiConfigurationFileSnapshot{"
+                + "filePath=" + filePath
+                + ", properties=" + properties
+                + '}';
+    }
+
+    private static Properties copyOf(Properties source) {
+        Properties copy = new Properties();
+        copy.putAll(Objects.requireNonNull(source, "properties must not be null"));
+        return copy;
+    }
+}

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiConfigurationTemplateFactory.java

@@ -0,0 +1,83 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Optional;
+
+import de.gecheckt.pdf.umbenenner.application.config.provider.AiProviderFamily;
+
+/**
+ * Creates the standard GUI configuration template.
+ * <p>
+ * The template contains both known provider blocks, a complete set of general configuration
+ * values and a clean editor state that can be used for a brand-new configuration.
+ */
+public final class GuiConfigurationTemplateFactory {
+
+    private static final String SOURCE_FOLDER = "./work/local/source";
+    private static final String TARGET_FOLDER = "./work/local/target";
+    private static final String SQLITE_FILE = "./work/local/pdf-umbenenner.db";
+    private static final String PROMPT_TEMPLATE_FILE = "./config/prompts/template.txt";
+    private static final String RUNTIME_LOCK_FILE = "./work/local/pdf-umbenenner.lock";
+    private static final String LOG_DIRECTORY = "./work/local/logs";
+    private static final String LOG_LEVEL = "INFO";
+    private static final String MAX_RETRIES_TRANSIENT = "3";
+    private static final String MAX_PAGES = "10";
+    private static final String MAX_TEXT_CHARACTERS = "5000";
+
+    private static final String OPENAI_BASE_URL = "https://api.openai.com/v1";
+    private static final String OPENAI_MODEL = "gpt-4o-mini";
+    private static final String OPENAI_TIMEOUT_SECONDS = "30";
+
+    private static final String CLAUDE_BASE_URL = "https://api.anthropic.com";
+    private static final String CLAUDE_MODEL = "claude-3-5-sonnet-20241022";
+    private static final String CLAUDE_TIMEOUT_SECONDS = "60";
+
+    private GuiConfigurationTemplateFactory() {
+        // Utility class.
+    }
+
+    /**
+     * Creates a brand-new clean editor state containing the standard configuration template.
+     *
+     * @return a clean editor state with no loaded file snapshot
+     */
+    public static GuiConfigurationEditorState createStandardTemplate() {
+        GuiConfigurationValues standardValues = createStandardValues();
+        return new GuiConfigurationEditorState(Optional.empty(), standardValues, standardValues);
+    }
+
+    /**
+     * Creates the editable values for the standard configuration template.
+     *
+     * @return the standard editable configuration values
+     */
+    public static GuiConfigurationValues createStandardValues() {
+        Map<AiProviderFamily, GuiProviderConfigurationState> providerConfigurations = new LinkedHashMap<>();
+        providerConfigurations.put(AiProviderFamily.CLAUDE, new GuiProviderConfigurationState(
+                CLAUDE_BASE_URL,
+                CLAUDE_MODEL,
+                CLAUDE_TIMEOUT_SECONDS,
+                GuiProviderApiKeyState.unresolved()));
+        providerConfigurations.put(AiProviderFamily.OPENAI_COMPATIBLE, new GuiProviderConfigurationState(
+                OPENAI_BASE_URL,
+                OPENAI_MODEL,
+                OPENAI_TIMEOUT_SECONDS,
+                GuiProviderApiKeyState.unresolved()));
+
+        return new GuiConfigurationValues(
+                SOURCE_FOLDER,
+                TARGET_FOLDER,
+                SQLITE_FILE,
+                PROMPT_TEMPLATE_FILE,
+                RUNTIME_LOCK_FILE,
+                LOG_DIRECTORY,
+                LOG_LEVEL,
+                MAX_RETRIES_TRANSIENT,
+                MAX_PAGES,
+                MAX_TEXT_CHARACTERS,
+                Boolean.toString(false),
+                AiProviderFamily.CLAUDE.getIdentifier(),
+                providerConfigurations);
+    }
+}

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiConfigurationValues.java

@@ -0,0 +1,107 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+
+import de.gecheckt.pdf.umbenenner.application.config.provider.AiProviderFamily;
+
+/**
+ * Editable GUI values for the complete configuration document.
+ * <p>
+ * This object combines all known general configuration values and the provider-specific blocks
+ * in a single model that can be rendered and edited by the GUI.
+ *
+ * @param sourceFolder source-folder path as editable text
+ * @param targetFolder target-folder path as editable text
+ * @param sqliteFile SQLite file path as editable text
+ * @param promptTemplateFile prompt-template path as editable text
+ * @param runtimeLockFile optional runtime lock file path as editable text
+ * @param logDirectory optional log directory as editable text
+ * @param logLevel log level as editable text
+ * @param maxRetriesTransient transient retry limit as editable text
+ * @param maxPages page limit as editable text
+ * @param maxTextCharacters text limit as editable text
+ * @param logAiSensitive raw value of {@code log.ai.sensitive} as editable text
+ * @param activeProviderFamily raw value of {@code ai.provider.active} as editable text
+ * @param providerConfigurations provider-specific editor state keyed by provider family
+ */
+public record GuiConfigurationValues(
+        String sourceFolder,
+        String targetFolder,
+        String sqliteFile,
+        String promptTemplateFile,
+        String runtimeLockFile,
+        String logDirectory,
+        String logLevel,
+        String maxRetriesTransient,
+        String maxPages,
+        String maxTextCharacters,
+        String logAiSensitive,
+        String activeProviderFamily,
+        Map<AiProviderFamily, GuiProviderConfigurationState> providerConfigurations) {
+
+    /**
+     * Creates a new editable configuration state.
+     *
+     * @param sourceFolder source-folder path; {@code null} becomes an empty string
+     * @param targetFolder target-folder path; {@code null} becomes an empty string
+     * @param sqliteFile SQLite file path; {@code null} becomes an empty string
+     * @param promptTemplateFile prompt-template path; {@code null} becomes an empty string
+     * @param runtimeLockFile runtime lock file path; {@code null} becomes an empty string
+     * @param logDirectory log directory; {@code null} becomes an empty string
+     * @param logLevel log level; {@code null} becomes an empty string
+     * @param maxRetriesTransient transient retry limit; {@code null} becomes an empty string
+     * @param maxPages page limit; {@code null} becomes an empty string
+     * @param maxTextCharacters text limit; {@code null} becomes an empty string
+     * @param logAiSensitive raw {@code log.ai.sensitive} value; {@code null} becomes an empty string
+     * @param activeProviderFamily raw {@code ai.provider.active} value; {@code null} becomes an empty string
+     * @param providerConfigurations provider-specific state map; must not be {@code null}
+     */
+    public GuiConfigurationValues {
+        sourceFolder = normalizeText(sourceFolder);
+        targetFolder = normalizeText(targetFolder);
+        sqliteFile = normalizeText(sqliteFile);
+        promptTemplateFile = normalizeText(promptTemplateFile);
+        runtimeLockFile = normalizeText(runtimeLockFile);
+        logDirectory = normalizeText(logDirectory);
+        logLevel = normalizeText(logLevel);
+        maxRetriesTransient = normalizeText(maxRetriesTransient);
+        maxPages = normalizeText(maxPages);
+        maxTextCharacters = normalizeText(maxTextCharacters);
+        logAiSensitive = normalizeText(logAiSensitive);
+        activeProviderFamily = normalizeText(activeProviderFamily);
+
+        LinkedHashMap<AiProviderFamily, GuiProviderConfigurationState> copy = new LinkedHashMap<>();
+        Objects.requireNonNull(providerConfigurations, "providerConfigurations must not be null")
+                .forEach(copy::put);
+        providerConfigurations = Collections.unmodifiableMap(copy);
+    }
+
+    /**
+     * Returns the editable state for the requested provider family.
+     *
+     * @param providerFamily the provider family to look up; must not be {@code null}
+     * @return the matching provider state, or {@code null} when not present
+     */
+    public GuiProviderConfigurationState providerConfiguration(AiProviderFamily providerFamily) {
+        return providerConfigurations.get(providerFamily);
+    }
+
+    /**
+     * Returns a copy with a different active provider-family identifier.
+     *
+     * @param providerFamily raw provider-family identifier; {@code null} becomes an empty string
+     * @return a new configuration values object with the requested active provider value
+     */
+    public GuiConfigurationValues withActiveProviderFamily(String providerFamily) {
+        return new GuiConfigurationValues(sourceFolder, targetFolder, sqliteFile, promptTemplateFile,
+                runtimeLockFile, logDirectory, logLevel, maxRetriesTransient, maxPages, maxTextCharacters,
+                logAiSensitive, providerFamily, providerConfigurations);
+    }
+
+    private static String normalizeText(String value) {
+        return value == null ? "" : value;
+    }
+}

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiProviderApiKeyState.java

@@ -0,0 +1,67 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import java.util.Objects;
+
+/**
+ * Editable state for a provider-specific API key.
+ * <p>
+ * This value object keeps the editable property value separate from the later displayable
+ * origin of the effective key value. The editor can therefore preserve the property text
+ * while later layers determine whether the effective value comes from the file, an
+ * environment variable, a compatibility fallback, or a technical default.
+ *
+ * @param propertyValue editable API-key property value as entered or loaded from the file
+ * @param effectiveValueOrigin provenance of the effective value shown or inferred later
+ * @param effectiveValueDescription human-readable provenance description for later display
+ */
+public record GuiProviderApiKeyState(
+        String propertyValue,
+        GuiValueOrigin effectiveValueOrigin,
+        String effectiveValueDescription) {
+
+    /**
+     * Creates a key state with a blank property value and unresolved provenance.
+     *
+     * @return a new unresolved API-key state
+     */
+    public static GuiProviderApiKeyState unresolved() {
+        return new GuiProviderApiKeyState("", GuiValueOrigin.UNKNOWN, "nicht aufgeloest");
+    }
+
+    /**
+     * Creates a key state with the supplied property value and unresolved provenance.
+     *
+     * @param propertyValue editable property value; may be {@code null}
+     * @return a new unresolved API-key state
+     */
+    public static GuiProviderApiKeyState unresolved(String propertyValue) {
+        return new GuiProviderApiKeyState(propertyValue, GuiValueOrigin.UNKNOWN, "nicht aufgeloest");
+    }
+
+    /**
+     * Creates a key state with an explicit effective-value provenance.
+     *
+     * @param propertyValue editable property value; may be {@code null}
+     * @param effectiveValueOrigin origin of the effective value; must not be {@code null}
+     * @param effectiveValueDescription human-readable provenance description; may be {@code null}
+     * @return a new API-key state with the requested provenance
+     */
+    public static GuiProviderApiKeyState resolved(String propertyValue,
+                                                  GuiValueOrigin effectiveValueOrigin,
+                                                  String effectiveValueDescription) {
+        return new GuiProviderApiKeyState(propertyValue, effectiveValueOrigin, effectiveValueDescription);
+    }
+
+    /**
+     * Creates a new key state.
+     *
+     * @param propertyValue editable property value; {@code null} is converted to an empty string
+     * @param effectiveValueOrigin origin of the effective value; {@code null} becomes {@link GuiValueOrigin#UNKNOWN}
+     * @param effectiveValueDescription human-readable provenance description; {@code null} becomes an empty string
+     */
+    public GuiProviderApiKeyState {
+        propertyValue = propertyValue == null ? "" : propertyValue;
+        effectiveValueOrigin = Objects.requireNonNullElse(effectiveValueOrigin, GuiValueOrigin.UNKNOWN);
+        effectiveValueDescription = effectiveValueDescription == null ? "" : effectiveValueDescription;
+    }
+}

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiProviderConfigurationState.java

@@ -0,0 +1,45 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import java.util.Objects;
+
+/**
+ * Editable GUI state for one provider-family configuration block.
+ * <p>
+ * The fields are stored as editor-friendly strings so later GUI layers can bind them directly
+ * to text-based controls without prematurely parsing or validating them.
+ *
+ * @param baseUrl provider endpoint base URL as editable text
+ * @param model model identifier as editable text
+ * @param timeoutSeconds timeout value as editable text
+ * @param apiKey API-key state for the provider
+ */
+public record GuiProviderConfigurationState(
+        String baseUrl,
+        String model,
+        String timeoutSeconds,
+        GuiProviderApiKeyState apiKey) {
+
+    /**
+     * Creates a provider configuration state with all text fields blank and the API key unresolved.
+     *
+     * @return a blank provider configuration state
+     */
+    public static GuiProviderConfigurationState blank() {
+        return new GuiProviderConfigurationState("", "", "", GuiProviderApiKeyState.unresolved());
+    }
+
+    /**
+     * Creates a new provider configuration state.
+     *
+     * @param baseUrl provider endpoint base URL; {@code null} becomes an empty string
+     * @param model model identifier; {@code null} becomes an empty string
+     * @param timeoutSeconds timeout value; {@code null} becomes an empty string
+     * @param apiKey API-key state; when {@code null}, an unresolved blank key state is used
+     */
+    public GuiProviderConfigurationState {
+        baseUrl = baseUrl == null ? "" : baseUrl;
+        model = model == null ? "" : model;
+        timeoutSeconds = timeoutSeconds == null ? "" : timeoutSeconds;
+        apiKey = Objects.requireNonNullElse(apiKey, GuiProviderApiKeyState.unresolved());
+    }
+}

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiValueOrigin.java

@@ -0,0 +1,25 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+/**
+ * Describes the effective origin of a configuration value shown by the editor.
+ * <p>
+ * The enum is intentionally broad enough to accommodate later provenance display for
+ * provider-specific values such as API keys.
+ */
+public enum GuiValueOrigin {
+
+    /** The value has not been resolved to a concrete origin yet. */
+    UNKNOWN,
+
+    /** The value comes from the editable property value stored in the configuration file. */
+    PROPERTY_VALUE,
+
+    /** The value comes from a provider-specific environment variable. */
+    ENVIRONMENT_VARIABLE,
+
+    /** The value comes from the legacy environment variable accepted for compatibility. */
+    LEGACY_ENVIRONMENT_VARIABLE,
+
+    /** The value is a technical default supplied by the application. */
+    DEFAULT_VALUE
+}

pdf-umbenenner-adapter-in-gui/src/main/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/package-info.java

@@ -0,0 +1,12 @@
+/**
+ * Editor state and template model for the JavaFX configuration editor.
+ * <p>
+ * This package contains the GUI-side representation of configuration data that can be edited
+ * independently from file I/O and validation. It separates loaded file snapshots, baseline
+ * editor values, current editor values, provider-specific API key state, and the derived
+ * dirty-state view used by the GUI.
+ * <p>
+ * The classes in this package are intentionally free of JavaFX controls so they can be reused
+ * by later GUI layers without coupling the model to a particular layout implementation.
+ */
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;

pdf-umbenenner-adapter-in-gui/src/test/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiConfigurationEditorStateTest.java

@@ -0,0 +1,81 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+class GuiConfigurationEditorStateTest {
+
+    @Test
+    void dirtyStateReflectsComparisonAgainstBaseline() {
+        GuiConfigurationEditorState state = GuiConfigurationTemplateFactory.createStandardTemplate();
+        GuiConfigurationValues editedValues = new GuiConfigurationValues(
+                state.values().sourceFolder(),
+                state.values().targetFolder(),
+                state.values().sqliteFile(),
+                state.values().promptTemplateFile(),
+                state.values().runtimeLockFile(),
+                state.values().logDirectory(),
+                state.values().logLevel(),
+                state.values().maxRetriesTransient(),
+                state.values().maxPages(),
+                state.values().maxTextCharacters(),
+                "maybe",
+                "claude-42",
+                state.values().providerConfigurations());
+
+        GuiConfigurationEditorState dirty = state.withValues(editedValues);
+
+        assertTrue(dirty.isDirty());
+        assertEquals(state.baselineValues(), dirty.baselineValues());
+        assertEquals(editedValues, dirty.values());
+        assertEquals(GuiChangeState.DIRTY, dirty.changeState());
+
+        GuiConfigurationEditorState cleanAgain = dirty.markClean();
+        assertFalse(cleanAgain.isDirty());
+        assertEquals(state.baselineValues(), cleanAgain.baselineValues());
+        assertEquals(state.baselineValues(), cleanAgain.values());
+        assertEquals(GuiChangeState.CLEAN, cleanAgain.changeState());
+    }
+
+    @Test
+    void loadedFileSnapshotCanBeAttachedWithoutChangingDirtyState() {
+        GuiConfigurationEditorState state = GuiConfigurationTemplateFactory.createStandardTemplate();
+        GuiConfigurationFileSnapshot snapshot = new GuiConfigurationFileSnapshot(
+                java.nio.file.Path.of("config/application.properties"),
+                new java.util.Properties());
+
+        GuiConfigurationEditorState withSnapshot = state.withLoadedFileSnapshot(snapshot);
+
+        assertTrue(withSnapshot.hasLoadedFileSnapshot());
+        assertFalse(withSnapshot.isNewConfiguration());
+        assertEquals(snapshot, withSnapshot.loadedFileSnapshot().orElseThrow());
+        assertFalse(withSnapshot.isDirty());
+    }
+
+    @Test
+    void resettingTheCurrentValuesToTheBaselineMakesTheEditorCleanAgain() {
+        GuiConfigurationEditorState state = GuiConfigurationTemplateFactory.createStandardTemplate();
+        GuiConfigurationValues editedValues = new GuiConfigurationValues(
+                state.values().sourceFolder(),
+                state.values().targetFolder(),
+                state.values().sqliteFile(),
+                state.values().promptTemplateFile(),
+                state.values().runtimeLockFile(),
+                state.values().logDirectory(),
+                state.values().logLevel(),
+                state.values().maxRetriesTransient(),
+                state.values().maxPages(),
+                state.values().maxTextCharacters(),
+                "true",
+                "openai-compatible",
+                state.values().providerConfigurations());
+
+        GuiConfigurationEditorState reverted = state.withValues(editedValues).withValues(state.baselineValues());
+
+        assertFalse(reverted.isDirty());
+        assertEquals(state.baselineValues(), reverted.values());
+    }
+}

pdf-umbenenner-adapter-in-gui/src/test/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiConfigurationFileSnapshotTest.java

@@ -0,0 +1,29 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.nio.file.Path;
+import java.util.Properties;
+
+import org.junit.jupiter.api.Test;
+
+class GuiConfigurationFileSnapshotTest {
+
+    @Test
+    void propertiesAreDefensivelyCopiedOnRead() {
+        Properties properties = new Properties();
+        properties.setProperty("source.folder", "./source");
+
+        GuiConfigurationFileSnapshot snapshot = new GuiConfigurationFileSnapshot(Path.of("config/application.properties"), properties);
+
+        Properties firstRead = snapshot.properties();
+        firstRead.setProperty("source.folder", "./changed");
+
+        Properties secondRead = snapshot.properties();
+        assertNotSame(firstRead, secondRead);
+        assertEquals("./source", secondRead.getProperty("source.folder"));
+        assertTrue(snapshot.hasFilePath(Path.of("config/application.properties")));
+    }
+}

pdf-umbenenner-adapter-in-gui/src/test/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiConfigurationTemplateFactoryTest.java

@@ -0,0 +1,78 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.List;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+import de.gecheckt.pdf.umbenenner.application.config.provider.AiProviderFamily;
+
+class GuiConfigurationTemplateFactoryTest {
+
+    @Test
+    void createStandardTemplate_providesCompleteCleanEditorState() {
+        GuiConfigurationEditorState state = GuiConfigurationTemplateFactory.createStandardTemplate();
+
+        assertFalse(state.isDirty());
+        assertFalse(state.hasLoadedFileSnapshot());
+        assertTrue(state.isNewConfiguration());
+
+        GuiConfigurationValues values = state.values();
+        assertEquals("./work/local/source", values.sourceFolder());
+        assertEquals("./work/local/target", values.targetFolder());
+        assertEquals("./work/local/pdf-umbenenner.db", values.sqliteFile());
+        assertEquals("./config/prompts/template.txt", values.promptTemplateFile());
+        assertEquals("./work/local/pdf-umbenenner.lock", values.runtimeLockFile());
+        assertEquals("./work/local/logs", values.logDirectory());
+        assertEquals("INFO", values.logLevel());
+        assertEquals("3", values.maxRetriesTransient());
+        assertEquals("10", values.maxPages());
+        assertEquals("5000", values.maxTextCharacters());
+        assertEquals("false", values.logAiSensitive());
+        assertEquals(AiProviderFamily.CLAUDE.getIdentifier(), values.activeProviderFamily());
+
+        List<AiProviderFamily> providerOrder = values.providerConfigurations().keySet().stream().toList();
+        assertEquals(List.of(AiProviderFamily.CLAUDE, AiProviderFamily.OPENAI_COMPATIBLE), providerOrder);
+
+        GuiProviderConfigurationState claude = values.providerConfiguration(AiProviderFamily.CLAUDE);
+        assertNotNull(claude);
+        assertEquals("https://api.anthropic.com", claude.baseUrl());
+        assertEquals("claude-3-5-sonnet-20241022", claude.model());
+        assertEquals("60", claude.timeoutSeconds());
+        assertEquals("", claude.apiKey().propertyValue());
+        assertEquals(GuiValueOrigin.UNKNOWN, claude.apiKey().effectiveValueOrigin());
+
+        GuiProviderConfigurationState openAi = values.providerConfiguration(AiProviderFamily.OPENAI_COMPATIBLE);
+        assertNotNull(openAi);
+        assertEquals("https://api.openai.com/v1", openAi.baseUrl());
+        assertEquals("gpt-4o-mini", openAi.model());
+        assertEquals("30", openAi.timeoutSeconds());
+        assertEquals("", openAi.apiKey().propertyValue());
+        assertEquals(GuiValueOrigin.UNKNOWN, openAi.apiKey().effectiveValueOrigin());
+    }
+
+    @Test
+    void providerConfigurationMap_isImmutableFromOutside() {
+        GuiConfigurationValues values = GuiConfigurationTemplateFactory.createStandardValues();
+
+        assertThrows(UnsupportedOperationException.class, () ->
+                values.providerConfigurations().put(AiProviderFamily.CLAUDE, GuiProviderConfigurationState.blank()));
+    }
+
+    @Test
+    void withActiveProviderFamily_reusesProviderBlocksAndChangesSelection() {
+        GuiConfigurationValues values = GuiConfigurationTemplateFactory.createStandardValues();
+
+        GuiConfigurationValues switched = values.withActiveProviderFamily(AiProviderFamily.OPENAI_COMPATIBLE.getIdentifier());
+
+        assertEquals(AiProviderFamily.OPENAI_COMPATIBLE.getIdentifier(), switched.activeProviderFamily());
+        assertEquals(values.providerConfigurations(), switched.providerConfigurations());
+        assertEquals(values.sourceFolder(), switched.sourceFolder());
+    }
+}

pdf-umbenenner-adapter-in-gui/src/test/java/de/gecheckt/pdf/umbenenner/adapter/in/gui/editor/GuiConfigurationValuesTest.java

@@ -0,0 +1,65 @@
+package de.gecheckt.pdf.umbenenner.adapter.in.gui.editor;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+import de.gecheckt.pdf.umbenenner.application.config.provider.AiProviderFamily;
+
+class GuiConfigurationValuesTest {
+
+    @Test
+    void rawGeneralValuesRemainUntouched() {
+        Map<AiProviderFamily, GuiProviderConfigurationState> providerConfigurations = new LinkedHashMap<>();
+        providerConfigurations.put(AiProviderFamily.CLAUDE, GuiProviderConfigurationState.blank());
+
+        GuiConfigurationValues values = new GuiConfigurationValues(
+                "./source",
+                "./target",
+                "./config/db.sqlite",
+                "./config/prompt.txt",
+                "./config/runtime.lock",
+                "./logs",
+                "DEBUG",
+                "12",
+                "34",
+                "56",
+                "maybe",
+                "not-a-provider-family",
+                providerConfigurations);
+
+        assertEquals("maybe", values.logAiSensitive());
+        assertEquals("not-a-provider-family", values.activeProviderFamily());
+        assertEquals(GuiProviderConfigurationState.blank(), values.providerConfiguration(AiProviderFamily.CLAUDE));
+    }
+
+    @Test
+    void providerConfigurationMapIsDefensivelyCopied() {
+        Map<AiProviderFamily, GuiProviderConfigurationState> providerConfigurations = new LinkedHashMap<>();
+        providerConfigurations.put(AiProviderFamily.CLAUDE, GuiProviderConfigurationState.blank());
+
+        GuiConfigurationValues values = new GuiConfigurationValues(
+                "./source",
+                "./target",
+                "./config/db.sqlite",
+                "./config/prompt.txt",
+                "./config/runtime.lock",
+                "./logs",
+                "DEBUG",
+                "12",
+                "34",
+                "56",
+                "true",
+                AiProviderFamily.CLAUDE.getIdentifier(),
+                providerConfigurations);
+
+        providerConfigurations.put(AiProviderFamily.OPENAI_COMPATIBLE, GuiProviderConfigurationState.blank());
+
+        assertNotSame(providerConfigurations, values.providerConfigurations());
+        assertEquals(1, values.providerConfigurations().size());
+    }
+}